I have a form with contact pickers on. They work fine in the preview, the work fine on the first view when the form is down loaded from a sharepoint library, they even work if I switch view at this point.
However when the form is opened after being submitted by email (it is also submitted to a database) to someone in using outlook I get the error
The action cannot be peformed for untrusted sites. To use find, you must add this site to the list of trusted sited for your web
In the bottom of the form it states that the forms location is on our intranet, which is a trusted site.
I don't have access to change the trusted sites list myself, but it could be done fairly quickly if I knew what settings needed to be changed.
It is not a browser only form